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Smart entry system

a technology of smart entry and vehicle, applied in the direction of anti-theft devices, program control, instruments, etc., can solve the problem of low possibility of mobile devices staying within the second transmission area for a predetermined time, and achieve the effect of enhancing user convenien

Active Publication Date: 2015-02-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a smart entry system for vehicles that is capable of detecting the presence of a mobile device within a specific area and then narrowing this area to a smaller area to improve security. The system can also notify the user about the narrowing or widening of the area through a notification section. The technical effect of this system is to enhance vehicle security and improve user convenience by allowing the mobile device to access the vehicle without having to approach it first. Additionally, the system can provide users with information about the size of the area they are in, making it easier for them to position themselves accordingly.

Problems solved by technology

Further, because the second transmission area, rather than the first transmission area, is set as the user gets off the vehicle, there is a low possibility of the mobile device continuing to stay within the second transmission area for a predetermined time or over.

Method used

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Embodiment Construction

[0026]The following will describe the preferred embodiments, but it should be appreciated that the present invention is not limited to the described embodiments and various modifications of the embodiments are possible without departing from the basic principles. The scope of the present invention is therefore to be determined solely by the appended claims. FIG. 1 is a view explanatory of an exemplary transmission area of a smart entry system according to the present invention. As shown in FIG. 1, such a transmission area is set outside of a vehicle 10 that is, for example, a motor vehicle. The transmission area shown in FIG. 1 is a first transmission area (hereinafter sometimes referred to as “first overall transmission area”) that is set first as a user or passenger gets off the vehicle 10. The first transmission area (first overall transmission area) comprises, for example, three first transmission area portions or sub-areas 21A, 22A and 23A. In FIG. 1, a mobile device 30 depicte...

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Abstract

A smart entry system comprises a communication section and a control device. Upon determination that a mobile device has continued to be present within a first transmission area for a predetermined time or over, the control device lowers first transmitter power output of a first electromagnetic wave to be transmitted from the communication section to second transmitter power output of the first electromagnetic wave so that the first transmission area is narrowed to a second transmission area until no more response is received from the mobile device. Then, the communication section not only transmits the first electromagnetic wave having the second transmitter power output and generating the second transmission area but also transmits, with a second cyclic period longer than the first cyclic period, a second electromagnetic wave, the second electromagnetic wave has the first transmitter power output and generates the first transmission area which is not narrowed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to and the full benefit of Japanese Patent Application No. 2013-174338 filed Aug. 26, 2013 and incorporates the Japanese application by reference herein in its entirety.FIELD OF THE INVENTION[0002]The present invention relates generally to an improvement of smart entry systems for vehicles.BACKGROUND OF THE INVENTION[0003]Japanese Patent Application Laid-open Publication No. 2008-14095 (hereinafter referred to as “the relevant patent literature”) discloses a vehicular keyless apparatus including a mobile device and a vehicle-mounted device. The vehicle-mounted device includes a control section as a control device, and the control section is connected to a communication section having, for example, an LF (Low Frequency) transmission section, a vehicular external antenna output section and antennas. Further, according to the disclosure of the relevant patent literature, once it is determined that the mobile d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G07C9/00
CPCG07C9/00182G07C2009/00634G07C2009/0019G07C9/00309G07C2009/00333G07C2009/00793G07C2209/63
Inventor YAMANE, KATSUYASUYAMAZAKI, MASAYUKI
Owner HONDA MOTOR CO LTD
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